diff --git a/libc/kernel/uapi/linux/vsockmon.h b/libc/kernel/uapi/linux/vsockmon.h
new file mode 100644
index 0000000..6435b5a
--- /dev/null
+++ b/libc/kernel/uapi/linux/vsockmon.h
@@ -0,0 +1,44 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_VSOCKMON_H
+#define _UAPI_VSOCKMON_H
+#include <linux/virtio_vsock.h>
+struct af_vsockmon_hdr {
+  __le64 src_cid;
+  __le64 dst_cid;
+  __le32 src_port;
+  __le32 dst_port;
+  __le16 op;
+  __le16 transport;
+  __le16 len;
+  __u8 reserved[2];
+};
+enum af_vsockmon_op {
+  AF_VSOCK_OP_UNKNOWN = 0,
+  AF_VSOCK_OP_CONNECT = 1,
+  AF_VSOCK_OP_DISCONNECT = 2,
+  AF_VSOCK_OP_CONTROL = 3,
+  AF_VSOCK_OP_PAYLOAD = 4,
+};
+enum af_vsockmon_transport {
+  AF_VSOCK_TRANSPORT_UNKNOWN = 0,
+  AF_VSOCK_TRANSPORT_NO_INFO = 1,
+  AF_VSOCK_TRANSPORT_VIRTIO = 2,
+};
+#endif